Gasoline engine valve-train mechanism simulation

The paper describes the engine valve-train mechanism´s dynamic analysis method, and introduces how to make dynamic simulation of it, and then makes the conclusions from the simulation results. In the process of simulation, first engine valve-train mechanism is modeled by CATIA software, and then models are imported into ADAMS software, so as to simulate the movement of engine valve-train mechanism. The assumption is made upon the air pressure on the valve, but the assumption is based on theoretical basis, it can meet the requirement of calculation. Finally, the valve-train velocity, acceleration, stress, cam stress and the valve-train stress under different cam speed curves are shown in this paper. Some conclusions including valve-train mechanism´s stability, oscillatory and the influence of stress of valves upon different cam speed are given at last.